【摘要】 利用数值分析软件LS-DYNA3D程序,研究了在爆炸荷载作用下衬砌加固洞室的抗爆加固效果以及衬砌参数对抗爆加固效果的影响规律。通过分析毛洞和衬砌洞室拱顶同一位置的压力曲线,得出压应力波形及传播规律合理;经过衬砌加固的洞室拱顶峰值位移明显减少,抗爆加固效果显著;当弹性模量不大时,随着弹性模量的增大,抗爆加固效果有所提高,但当弹性模量增大到一定值时,再增加衬砌的弹性模量,其抗爆加固效果反而不佳;衬砌的厚度对洞室的抗爆加固效果有一定的影响,但当衬砌的厚度增加到一定值时,再增加其厚度并不能明显提高衬砌洞室的抗爆加固效果。更多还原

【Abstract】 The ant-explosion anchoring effects of the lined tunnel are studied by LS-DYNA3D software under the explosive loads.The results show that by analyzing vertical stress temporal curves of unreinforced tunnel and lined tunnel at the same places,vertical stress temporal curves and its propagation law is reasonable,and vault displacement of lined tunnel is reduced significantly.The ant-explosion anchored effects are enhanced with the increasing of elastic modulus of lining,but when elastic modulus of lining reaches to a certain size,the ant-explosion anchored effects can not further be enhanced.When thickness of lining reaches to a certain size,the ant-explosion anchored effects can not be enhanced significantly as well.更多还原